Re: CH-8 charger -was UV-82, CH-6 charger
On 8/20/2021 9:05 AM, Rodney kraft via
groups.io wrote:
John,
Can you take the battery off
the radio and identify the actual radio for us?? I can't find
a "UV-8" radio anywhere.? The searches I do come up with a
UV-82, but no "UV-8".
As for a drop in chargers
(UV5R and UV-B6) have a 10Vdc input rating.? Do NOT exceed
this as they DON'T like higher voltage!??
There are several options for
charging the Baofeng radios from a 12Vdc vehicle system:
Amazon: cigarette lighter
plug type that provides a 10Vdc output for the drop in
charger.? It's only $9.49. Free shipping with Prime.
They also sell a USB charging
cable for the drop in charger.
There are several options out
there.??
Again, do NOT apply more that
the 10Vdc to the drop-in charger or it will damage it, or even
destroy it.
I'm the Radio Tech for our
County and have done some extensive research/experimenting
with the UV-5R and UV-B6 systems and they all work nice, but
you MUST follow THIER specifications if you want things to
work properly.
73's!
Rod
KC7CJO / WRKX427
He said the radio was the UV-82.
I've never opened mine either.
--
All the Best & 7 3s
Dale Miller, KC2CBD
Cookeville, Tennessee
Putnam County TN ARES
Emergency Coordinator
Vice President Cookeville Repeater Association
Ham Operator since 1997 (Extra)
stpatrick2@...
Registered Linux User: #317401
Linux since June 2003
Registered Ubuntu User #26423
--
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Re: CH-8 charger -was UV-82, CH-6 charger
John,
Can you take the battery off the radio and identify the actual radio for us?? I can't find a "UV-8" radio anywhere.? The searches I do come up with a UV-82, but no "UV-8".
As for a drop in chargers (UV5R and UV-B6) have a 10Vdc input rating.? Do NOT exceed this as they DON'T like higher voltage!??
There are several options for charging the Baofeng radios from a 12Vdc vehicle system:
Amazon: cigarette lighter plug type that provides a 10Vdc output for the drop in charger.? It's only $9.49. Free shipping with Prime.
They also sell a USB charging cable for the drop in charger.
There are several options out there.??
Again, do NOT apply more that the 10Vdc to the drop-in charger or it will damage it, or even destroy it.
I'm the Radio Tech for our County and have done some extensive research/experimenting with the UV-5R and UV-B6 systems and they all work nice, but you MUST follow THIER specifications if you want things to work properly.
73's!
Rod KC7CJO / WRKX427
On Friday, August 20, 2021, 04:48:42 AM PDT, John Button G8JMB via groups.io <hornpipe112@...> wrote:
Oops!
Charger is UV-8, not UV-6.? Or so a magnifier and better light tells me!
73
John G8JMB
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CH-8 charger -was UV-82, CH-6 charger
Oops!
Charger is UV-8, not UV-6.? Or so a magnifier and better light tells me!
73
John G8JMB
|
On Fri, Aug 20, 2021 at 12:25 AM, Donald Hellen wrote:
I searched and came up with nothing. Your best bet may be to open it
up and create a schematic then figure out what does what inside.
Hi Donald Subject line should read UV82 radio, CH6 Charger.? My searches were totally unproductive also. I'd open it? if I could - case looks welded shut or has hidden clips.? Bottom of charger says 'input 10VDC' but no AC adaptor came with the radio.? I charged it using a bench psu, but that's no good on the boat... 73 John G8JMB
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Do you have the original charger? It should saw what the max input voltage is for the charger on the sticker on the bottom.
My experience is that the input voltage to the drop in charger is 10.5 Vdc. The batteries are normally 7.4 Vdc.
You can buy a vehicle power cord for those chargers from Amazon pretty cheap.
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On Aug 19, 2021, at 16:25, Donald Hellen <donhellen@...> wrote:
?John . . .
On Thu, 19 Aug 2021 15:12:48 -0700, "John Button G8JMB via groups.io"
<hornpipe112@...> wrote:
Does anyone have a schematic for the UV-6 charger supplied with the UV-82? I searched and came up with nothing. Your best bet may be to open it
up and create a schematic then figure out what does what inside.
I did search for both a UV-6 and a CH-6 charger since your subject
line and text mention different model numbers for the charger. I did
find some chargers but not one specific to either of those numbers,
and one appears to be a DIY charger circuit. Maybe do a search and see
if any of the charger circuits for other Baofeng radios looks similar
to what's inside the case of your charger?
Donald KX8K
----------------------------------------------------
Some ham radio groups you may be interested in:
/g/ICOM /g/Ham-Antennas
/g/HamRadioHelp /g/Baofeng
/g/CHIRP
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John . . . On Thu, 19 Aug 2021 15:12:48 -0700, "John Button G8JMB via groups.io" <hornpipe112@...> wrote: Does anyone have a schematic for the UV-6 charger supplied with the UV-82? I searched and came up with nothing. Your best bet may be to open it up and create a schematic then figure out what does what inside. I did search for both a UV-6 and a CH-6 charger since your subject line and text mention different model numbers for the charger. I did find some chargers but not one specific to either of those numbers, and one appears to be a DIY charger circuit. Maybe do a search and see if any of the charger circuits for other Baofeng radios looks similar to what's inside the case of your charger? Donald KX8K ---------------------------------------------------- Some ham radio groups you may be interested in: /g/ICOM /g/Ham-Antennas/g/HamRadioHelp /g/Baofeng/g/CHIRP
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Hello everyone
Does anyone have a schematic for the UV-6 charger supplied with the UV-82?
Can I run the charger off a nominal 12VDC supply?
73
John G8JMB
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Folks,
I have a UV-25X2 mini mobile which I really like.
I was looking in the manual when I bought it and I noticed that it had a 3.5mm jack on the back that is TRRS (T(Tip, Ring, Ring, Sleeve).? It "says" that it's a headphone/PTT jack.? However, NO ONE has produced anything for it. Not Baofeng, Radioddity, or BTECH.
Has anyone in the group found anything either online, or maybe built something that would work for this?
I have thoroughly searched the internet and have come up dry.
Thanks!
?
Rod
KC7CJO@...
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Re: UV-5R Dual band mod to 220 MHz band
Hi Rod and Ray,
BaoFeng and RadioOddity do not seem to be concerned about what is legal or illegal.? Thus, if they could make a radio that would receive in the cellular band, and if they thought people would be interested in buying such a radio, they would likely offer it for sale on Amazon, ebay, and other outlets that facilitate such illegal imports.? I think the radio doesn't have the circuitry to receive those 800+ MHz signals.
Cheers,
Halden VE7UTS
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Re: DM-1701 not connecting to pc
The Baofeng DMR radios use a straight cable with no chip sets in them or drivers needed. I bought a DM-9HX (same as the BF-5R
but with the big battery). Unfortunately the dealer gave me the wrong cable and I had to buy one from BTech. The correct
cable part number is X002B3W39L and has a plain USB plug like a mouse or keyboard would have. If you have a?
larger plug with Baofeng on it, it's the wrong cable.
73,
Howard
WB4GUD
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Re: UV-5R Dual band mod to 220 MHz band
That frequency is for a local park and can be received on any "800" band scanner. Lock-out should not be an issue. However it is unknown if the Baofeng could receive that high even if the radio would accept it into memory.
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Re: UV-5R Dual band mod to 220 MHz band
If that frequency is in the cellular band then the firmware in the radio should block any reception as it is illegal to listen in that band. ? Not to mention the fact that it¡¯s most likely a digital signal and will only sound like static anyway.?
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On Aug 9, 2021, at 01:49, Ray Dunham <rdaw33@...> wrote:
? I use a UV-5r for receive only.? Using Rod's mods, I have tried to expand the UHF up into the? 800/900 area. I set the UHF upper limit to 858.000, the radio accepted it. Then I set the VFO to the desired 857.9375 and attempted to put it into a memory slot, it would not accept it. I am wondering where the limit is, and can I receive in this area. Has anyone experimented to see what the limits of these units are. I figure there is nothing to loose!!?
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Re: UV-5R Dual band mod to 220 MHz band
I use a UV-5r for receive only.? Using Rod's mods, I have tried to expand the UHF up into the? 800/900 area. I set the UHF upper limit to 858.000, the radio accepted it. Then I set the VFO to the desired 857.9375 and attempted to put it into a memory slot, it would not accept it. I am wondering where the limit is, and can I receive in this area. Has anyone experimented to see what the limits of these units are. I figure there is nothing to loose!!?
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Hello Group,
Here are the UV-5R specs, from page 17 in the manual.
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You are correct in that I have teh ability to test TX power and RX sensitivity of these radios.? I can test the output power no problems, b ut as there doesn't seem to be a service manual? for anything else, except maybe at the factory (which
they won't give out), I can only guess what the specifications would be.
If anyone knows this information, I would be happy to check it out, but I only have the UV-5R and BF-R3 models.
Sorry I couldm't be more help.
On Sunday, August 8, 2021, 04:47:13 AM PDT, Dave W6OQ via groups.io <david.hostetler@...> wrote:
Thanks Rodney for the interesting information.
Being a radio tech for your county, I assume that you have the equipment to check the TX power output and RX sensitivity of the updated radio on 220 MHz? I am certain that a lot of people here would be interested in hearing about the performance.
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Re: UV-5R Dual band mod to 220 MHz band
You are correct in that I have teh ability to test TX power and RX sensitivity of these radios.? I can test the output power no problems, b ut as there doesn't seem to be a service manual? for anything else, except maybe at the factory (which they won't give out), I can only guess what the specifications would be.
If anyone knows this information, I would be happy to check it out, but I only have the UV-5R and BF-R3 models.
Sorry I couldm't be more help.
On Sunday, August 8, 2021, 04:47:13 AM PDT, Dave W6OQ via groups.io <david.hostetler@...> wrote:
Thanks Rodney for the interesting information.
Being a radio tech for your county, I assume that you have the equipment to check the TX power output and RX sensitivity of the updated radio on 220 MHz? I am certain that a lot of people here would be interested in hearing about the performance.
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Re: UV-5R Dual band mod to 220 MHz band
Halden . . . On Sat, 07 Aug 2021 20:25:43 -0700, "HF via groups.io" <incorridge@...> wrote: I would like to remind us that it is our responsibility as hams to ensure that our radios are compliant with the spurious emissions rules applicable to where we operate. In many cases, the manufacturer does that for us. But for radios that are imported illegally as most of the inexpensive transceivers sold on ebay and Amazon are, it is our responsibility to quantitatively assess the radio's compliance with the rules ourselves before transmitting with them. I would be interested if anyone who does this mod who has the ability to check for spurious signals when unlocking the 220 feature to let us know what they find. As for illegal imports, the FCC has started enforcement actions against a few companies. Baofeng, I believe, made some changes in their radios recently to comply. Just about 3 years, ago, I purchased a pair of BF-888's which were advertised on the front of the package as license-free radios, like they were FRS radios, but they weren't type accepted for that. They didn't say they were FRS radios. Apparently the box advertising was for another country, perhaps? They were modifiable with CHIRP or other software to work in the 440 ham band, and can be put on FRS or GMRS frequencies, so they're useful to me, but strictly speaking, I shouldn't use them on FRS or GMRS because they're not type accepted for those services and they run higher power than allowed for FRS (and I haven't). I can use them for the 440 ham band. These radios can be put on commercial frequencies but again, that would be illegal in the US. Donald KX8K ---------------------------------------------------- Some ham radio groups you may be interested in: /g/ICOM /g/Ham-Antennas/g/HamRadioHelp /g/Baofeng/g/CHIRP
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Re: UV-5R Dual band mod to 220 MHz band
Hi Rod,
Thanks for posting those instructions.? I have one of the 3-band models already, but my 2-band radios are UV-82s.?
I would like to remind us that it is our responsibility as hams to ensure that our radios are compliant with the spurious emissions rules applicable to where we operate.? In many cases, the manufacturer does that for us.? But for radios that are imported illegally as most of the inexpensive transceivers sold on ebay and Amazon are, it is our responsibility to quantitatively assess the radio's compliance with the rules ourselves before transmitting with them.? It is also our responsibility to make such assessments when we modify a transmitter (for example, as described in these instructions).? Unfortunately, few of us have the equipment to perform those assessments ourselves.? We can consult other members of the clubs to which we belong for assistance with this.? One of the side-benefits of doing such an assessment is that we learn a lot about transmitters, circuits, harmonics, mixers, filters, etc. along the way.
Cheers
Halden VE7UTS
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Re: UV-5R Dual band mod to 220 MHz band
Thanks Rodney for the interesting information.
Being a radio tech for your county, I assume that you have the equipment to check the TX power output and RX sensitivity of the updated radio on 220 MHz? I am certain that a lot of people here would be interested in hearing about the performance.
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Re: UV-5R Dual band mod to 220 MHz band
Thanks, Donald. That makes sense now.
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Re: UV-5R Dual band mod to 220 MHz band
Milt . . . On Sat, 07 Aug 2021 15:07:46 -0700, "Milt / KJ7PPX" <milt.reynolds@...> wrote: What is "splatter"?
Splatter would include any radio emissions that's not intended to be transmitted. This could be spurious signals outside the intended transmit passband. According to one of the people who test radios for QST magazine, one big brand of radio puts out spurious signals. these might be below what the FCC allows but can interfere with nearby signals on the same band but are outside the intended bandwidth of the signal. I won't mention the brand, but it's not well-known that these radios are not putting out a clean signal. Donald KX8K ---------------------------------------------------- Some ham radio groups you may be interested in: /g/ICOM /g/Ham-Antennas/g/HamRadioHelp /g/Baofeng/g/CHIRP
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Dale Miller - KC2CBD
Doug J
Milt / KJ7PPX